Hamilton Beach 04912 TrueAir HEPA Replacement Filter for 04160 & 04161 Air Cleaners Replacement filter for 200-square-foot-coverage air purifiers HEPA filter provides 99.97-percent filtration Fast and easy replacement Fits models 04160 and 04161 Measures 2-1/4 by 11-5/8 by 13-5/8 inches